I have a handful of mods on my 89 civic hatchback. I'm running a b16a1 with aftermarket headers and a cat-back...without a cat. the thing is, my car's exhaust smokes A LOT. White exhaust smoke billows out even when in idle. now i know what you're thinking but its not only because its winter time it did this during the summer too. I'm wondering if it could be a fuel regulator problem or maybe i need to tune by cams to allow less exhaust out at a time or something? its all confusing and i would like any kind of help please.